Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-temperature-burst-resistant ultra-high-performance concrete and preparation method thereof
The invention belongs to the technical field of building materials, and particularly relates to high-temperature-burst-resistant ultra-high-performance concrete and a preparation method thereof. By adjusting the water-binder ratio, doping silica fume and a water reducing agent and limiting the particle size of the aggregate, the ultra-high performance concrete achieves optimized aggregate matching and higher compactness, so that the mechanical property and durability of the ultra-high performance concrete are ensured; and by doping the mixed fiber of the polypropylene fiber and the steel fiber into the ultra-high performance concrete matrix, the strength of the ultra-high performance concrete is improved, and the permeability at high temperature is synergistically improved, so that the concrete does not burst after being subjected to high temperature or fire disaster. The high-temperature-burst-resistant ultra-high-performance concrete provided by the invention has excellent mechanical properties after being hardened, the compressive strength of the concrete is not lower than the initial strength at the high temperature of 400 DEG C, the residual strength of the concrete is still greater than 40MPa after the concrete is subjected to the high temperature of 900 DEG C, and after the concrete is subjected to high temperature or fire, the surface of the concrete is not cracked, and the integrity and safety of a concrete structure can be improved.
本发明属于建筑材料技术领域，具体涉及一种抗高温爆裂超高性能混凝土及其制备方法。本发明通过调整水胶比、掺入硅灰和减水剂、限制骨料粒径使超高性能混凝土达到优化的集配和较高的密实度，从而保证了其力学性能和耐久性，并通过在超高性能混凝土基体中掺入聚丙烯纤维和钢纤维的混合纤维，不仅提高了其强度，而且协同提高了其在高温下的渗透性，使其在经历高温或火灾后无爆裂现象发生。本发明提供的抗高温爆裂超高性能混凝土硬化后具有优良的力学性能，在400℃高温下其抗压强度不低于初始强度，经历900℃高温后其残余强度仍大于40MPa，而且其在受高温或者火灾后，表面无爆裂，能够提高混凝土结构的完整性和安全性。
High-temperature-burst-resistant ultra-high-performance concrete and preparation method thereof
The invention belongs to the technical field of building materials, and particularly relates to high-temperature-burst-resistant ultra-high-performance concrete and a preparation method thereof. By adjusting the water-binder ratio, doping silica fume and a water reducing agent and limiting the particle size of the aggregate, the ultra-high performance concrete achieves optimized aggregate matching and higher compactness, so that the mechanical property and durability of the ultra-high performance concrete are ensured; and by doping the mixed fiber of the polypropylene fiber and the steel fiber into the ultra-high performance concrete matrix, the strength of the ultra-high performance concrete is improved, and the permeability at high temperature is synergistically improved, so that the concrete does not burst after being subjected to high temperature or fire disaster. The high-temperature-burst-resistant ultra-high-performance concrete provided by the invention has excellent mechanical properties after being hardened, the compressive strength of the concrete is not lower than the initial strength at the high temperature of 400 DEG C, the residual strength of the concrete is still greater than 40MPa after the concrete is subjected to the high temperature of 900 DEG C, and after the concrete is subjected to high temperature or fire, the surface of the concrete is not cracked, and the integrity and safety of a concrete structure can be improved.
本发明属于建筑材料技术领域，具体涉及一种抗高温爆裂超高性能混凝土及其制备方法。本发明通过调整水胶比、掺入硅灰和减水剂、限制骨料粒径使超高性能混凝土达到优化的集配和较高的密实度，从而保证了其力学性能和耐久性，并通过在超高性能混凝土基体中掺入聚丙烯纤维和钢纤维的混合纤维，不仅提高了其强度，而且协同提高了其在高温下的渗透性，使其在经历高温或火灾后无爆裂现象发生。本发明提供的抗高温爆裂超高性能混凝土硬化后具有优良的力学性能，在400℃高温下其抗压强度不低于初始强度，经历900℃高温后其残余强度仍大于40MPa，而且其在受高温或者火灾后，表面无爆裂，能够提高混凝土结构的完整性和安全性。
High-temperature-burst-resistant ultra-high-performance concrete and preparation method thereof
一种抗高温爆裂超高性能混凝土及其制备方法
LI YE (Autor:in) / LIU TIEJUN (Autor:in) / ZOU DUJIAN (Autor:in) / GUO HENGHUI (Autor:in)
10.08.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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